CN102951702A - Crude-oil sewage treating agent - Google Patents

Crude-oil sewage treating agent Download PDF

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Publication number
CN102951702A
CN102951702A CN2012104504304A CN201210450430A CN102951702A CN 102951702 A CN102951702 A CN 102951702A CN 2012104504304 A CN2012104504304 A CN 2012104504304A CN 201210450430 A CN201210450430 A CN 201210450430A CN 102951702 A CN102951702 A CN 102951702A
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China
Prior art keywords
agent
oil
sewage
treating agent
crude
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Pending
Application number
CN2012104504304A
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Chinese (zh)
Inventor
张成如
阚红静
赵玉
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SHANDONG TAIDE NEW ENERGY CO Ltd
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SHANDONG TAIDE NEW ENERGY CO Ltd
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Priority to CN2012104504304A priority Critical patent/CN102951702A/en
Publication of CN102951702A publication Critical patent/CN102951702A/en
Pending legal-status Critical Current

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Abstract

The invention belongs to the field of crude-oil sewage treatment, and more particularly relates to a crude-oil sewage treating agent. The crude-oil sewage treating agent comprises a demulsifying agent, a flocculating agent and a solvent, wherein the mass ratio of the demulsifying agent, the flocculating agent and the solvent is 25:1:74. The crude-oil sewage treating agent has the beneficial effects that the non-ionic type surface active agent is adopted, the oil-water interface of emulsified particles can be quickly reached, a water layer is released, so that emulsified oil drops are free; simultaneously the molecules of the surface active agent also can play a role of bridging, the oil drops are effectively condensed, the upward floating of the oil drops is accelerated; and in addition, good compatibility of the non-ionic type reagent is beneficial to the synergistic effect of multiple chemical components, and the purpose of multiple functions with one agent in the process of sewage treatment is realized.

Description

A kind of crude oil class oily water treatment agent
Technical field
The invention belongs to the crude oil class sewage treatment area, more particularly relate to a kind of crude oil class oily water treatment agent.
Background technology
Along with the development of Chinese national economy and the raising of living standards of the people, particularly the demand of oil is growing to the energy.Except enlarging the new oil field of import and positive searching exploitation, the stable yields that keeps domestic traditional oil field also is important measures that ensure oil supply.Through the exploitation of decades, domestic main onshore oil field enters high water-cut stage one after another.Technology of reservoir sweep take polyacrylamide solution as displacing fluid (abbreviation polymer flooding) just becomes the important technical that improves oil recovery rate.
Polymer flooding has caused containing in the oil extraction-generated waste water polymkeric substance and other chemical agents, make crude oil complicated and changeable at emulsification type and the emulsified state of water, the water-oil interface of emulsified oil droplet are more firm, so the oily water separation difficulty is very large in sewage disposal and the dehydrating of crude oil process.In addition, compare with conventional return water, injection region extraction sewage viscosity is larger, and oil droplet and suspended solid are slow in aqueous phase come-up or settling velocity, and this specific character of injection region extraction sewage directly affects breakdown of emulsion and the flocculating effect in the water treatment procedure.This is so that adopt traditional sewage-treating agent to be difficult to oily water separation and the sewage purification index that reaches qualified.So research and development just become a urgent task that realistic meaning is arranged for the sewage-treating agent of polymer-containing wastewater.
Because the singularity of process for petroleum recovery, the sewage after purifying treatment is mainly used in re-injection.After adopting tertiary oil recovery technology, carry out re-injection after the sewage after processing and polymkeric substance and other chemical agents need to being mixed with displacing fluid.A Main Function of polymkeric substance is the viscosity that improves displacing fluid, therefore, sewage after the processing just becomes vital problem to the impact of polymer solution viscosity, thereby the sewage after guarantee processing and the compatibleness of polymkeric substance just become the prerequisite of guaranteeing the novel sewage treatment agent successful Application.
The main component of sewage-treating agent is tensio-active agent, because the multi-bands such as clay particle of crude oil surface adsorption have negative charge to cause forming milk sap.Sewage-treating agent commonly used adopted the effect that reaches breakdown of emulsion in the cationic surfactant with the electric charge of oil droplets more in the past.And tertiary oil recovery commonly used be the polymkeric substance of partial hydrolysis, on the molecule with a large amount of negative charges, can neutralizing cation type tensio-active agent with electric charge.Therefore, in the composition design for the sewage-treating agent of polymer-containing wastewater, to take into full account the charged impact of polymkeric substance.
Summary of the invention
For above deficiency, the invention provides under a kind of prerequisite not affecting polymer solution viscosity, obtain the processing crude oil class oily water treatment agent of good dehydrating of crude oil, oily water separation texts.
A kind of prescription of crude oil class sewage-treating agent comprises emulsion splitter, flocculation agent and solvent, and the mass ratio of emulsion splitter, flocculation agent and solvent is 25:1:74.
Above-mentioned emulsion splitter is nonionic surface active agent.
Above-mentioned flocculation agent is cationic-type polyacrylamide.
Above-mentioned cationic-type polyacrylamide relative molecular mass 1,000 ten thousand, cationic degree 12%, solvent are distilled water.
Above-mentioned solvent is methyl alcohol and distilled water, and the mass ratio of methyl alcohol and distilled water is 35:39.
The invention has the beneficial effects as follows: adopt nonionic surface active agent, can arrive rapidly the water-oil interface of emulsified particle and discharge water layer, make emulsified oil droplet free out, simultaneously, surfactant molecule itself can play bridging action again, effectively condenses oil droplet, accelerate its come-up, in addition, the good compatibility of non-ionic type reagent is conducive to number of chemical component synergy, realizes the purpose of potion multipotency in the sewage treatment process.
Embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is described in detail.
Embodiment 1
Oil-water separation is estimated
Crude oil polluted water process agent preparation and application
Component proportion (in mass): nonionic surface active agent: 25%, with cationic-type polyacrylamide (relative molecular mass 1,000 ten thousand, cationic degree 12%): 1%; Methyl alcohol: 35%, distilled water: 39%.
Preparation method: make as the reagent mechanical stirring mixes take distilled water by formula ratio.
Experimental subjects: take from certain joint station well array and come liquid, sample is isolated island oil recovery factory injection region group Produced Liquid.
Experimental technique: at first preheating 10 minutes in 50 ℃ water bath with thermostatic control of the sewage sample that will get the same day, then the medicament that adds predetermined dose, 200 rev/mins are stirred after 20 minutes 50 ℃ and continue insulation 30 minutes, the water sample boiling range that pipettes 50 milliliters is oil-containing in 90 ℃~120 ℃ petroleum ether extraction water, according to " petroclastic rock reservoir water water quality fertilizer index and analytical procedure " standard, measure crude content.
From this treatment agent of table 1 oil-water separation to certain joint station oily(waste)water under the different concns condition, when drug concentration is 18.75mg/L, sewage to different oleaginousness all has good oil-water separation, and the oleaginousness of sewage is below 20mg/L after processing.
Table 2 is that the oil-water separation to certain joint station oily(waste)water is added up under this medicament different concns condition.Experimental result shows that in one month continuous detecting process, the oil in water emulsion content of certain joint station sewage is very large, and the oil in water emulsion content in the sewage that enters the station is from 300 mg/L to 2348 mg/L.From treatment agent oil-water separation to certain joint station oily(waste)water under the different concns condition, when drug concentration is 18.75mg/L, sewage to different oleaginousness all has good oil-water separation, and the oleaginousness of sewage is all below 20mg/L after processing.
Therefore, in following performance evaluation experiment, the adding consistency of this medicament in certain joint station oily(waste)water all is defined as 18.75 mg/L.
Embodiment 2
Demulsification performance is estimated
Component proportion, preparation method's experimental subjects as above.
Experiment condition: the oil sample that will get the same day divides in the tool plug graduated cylinder that installs to 80mL, 50 ℃ of preheatings 15 minutes, then the medicament that adds predetermined dose, rest on after shaking up in 50 ℃ the glass water bath with thermostatic control, according to " the emulsion splitter use properties method of inspection (bottle examination method) " standard, record respectively the aquifer yield of different time.
This medicament and on-the-spot water conditioner (XPI-5085B/LGS-2) are carried out the breakdown of emulsion processing to experimental subjects, record the result behind the 90min.
Experimental result shows, when the adding consistency of sewage-treating agent sewage disposal agent prescription of the present invention is 25~30 mg/L, the demulsification basic simlarity of the on-the-spot sewage-treating agent (XPI-5085B/LGS-2) of its breaking emulsion and dewatering ability and 100 mg/L is deviate from the water of 10.0~11.0mL in all can 80mL crude oil; When the equal 25mg/L of adding consistency, the dehydration rate of sewage-treating agent sewage disposal agent prescription of the present invention is 2 times of on-the-spot sewage-treating agent; When the adding consistency of sewage disposal agent prescription of the present invention was 20mg/L, the dehydrating amount of 80mL crude oil had reached the maximum of 12.0~12.5mL.
Embodiment 3
Component proportion, the preparation method as above.
Experiment condition: the polyacrylamide mother liquor of at first preparing 5000mg/L with distilled water water, then be diluted to respectively 1500mg/L with the water (clear water or sewage) that contains the different concns medicament, according to " displacement of reservoir oil acrylamide copolymer performance measurement " standard, measure the viscosity of polymers soln.
From the table as can be known: sewage disposal agent prescription of the present invention in the drug concentration scope of 5-30mg/L to polyacrylamide (3530S) soltion viscosity without any detrimentally affect.
                                                                                      

Claims (7)

1. crude oil class sewage-treating agent, it is characterized in that: this treatment agent comprises emulsion splitter, flocculation agent and solvent, the mass ratio of described emulsion splitter, flocculation agent and solvent is 25:1:74.
2. a kind of crude oil class sewage-treating agent according to claim 1, it is characterized in that: described emulsion splitter is nonionic surface active agent.
3. a kind of crude oil class sewage-treating agent according to claim 1, it is characterized in that: described flocculation agent is cationic-type polyacrylamide.
4. each described a kind of crude oil class sewage-treating agent according to claim 1-3 is characterized in that: described cationic-type polyacrylamide relative molecular mass 1,000 ten thousand, cationic degree 12%.
5. a kind of crude oil class sewage-treating agent according to claim 1, it is characterized in that: described solvent is methyl alcohol and distilled water.
6. a kind of crude oil class sewage-treating agent according to claim 5, it is characterized in that: the mass ratio of described methyl alcohol and distilled water is 35:39.
7. a kind of crude oil class sewage-treating agent according to claim 4, it is characterized in that: described solvent is distilled water.
CN2012104504304A 2012-11-13 2012-11-13 Crude-oil sewage treating agent Pending CN102951702A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN2012104504304A CN102951702A (en) 2012-11-13 2012-11-13 Crude-oil sewage treating agent

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CN102951702A true CN102951702A (en) 2013-03-06

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105016421A (en) * 2015-07-30 2015-11-04 李平兰 Industrial oil-containing sewage treatment agent
CN107572644A (en) * 2017-06-12 2018-01-12 盘锦金宇众和工程服务有限公司 Oil-field thick-oil sewage oil removing water cleaning agent preparation method
CN108993386A (en) * 2018-07-31 2018-12-14 郑州工程技术学院 A kind of cleanser and preparation method thereof for disposing polluted water in oil
CN110282687A (en) * 2019-07-09 2019-09-27 浙江大学常州工业技术研究院 Pharmaceutical wastewater inorganic agent

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1955122A (en) * 2005-10-26 2007-05-02 中国石油化工股份有限公司 Method for treating oil-containing waste water
CN101254984A (en) * 2008-04-14 2008-09-03 唐山市华锋实业有限公司 Centralized processing technique for slop oil and acidic oil and processing system thereof
CN101279786A (en) * 2007-04-04 2008-10-08 中国石油化工股份有限公司 Method for treatment of oil-bearing waste water
CN102689941A (en) * 2012-05-29 2012-09-26 中国海洋石油总公司 Method for treating sewage in polymer flooding oilfield

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1955122A (en) * 2005-10-26 2007-05-02 中国石油化工股份有限公司 Method for treating oil-containing waste water
CN101279786A (en) * 2007-04-04 2008-10-08 中国石油化工股份有限公司 Method for treatment of oil-bearing waste water
CN101254984A (en) * 2008-04-14 2008-09-03 唐山市华锋实业有限公司 Centralized processing technique for slop oil and acidic oil and processing system thereof
CN102689941A (en) * 2012-05-29 2012-09-26 中国海洋石油总公司 Method for treating sewage in polymer flooding oilfield

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Title
李克顺: "一种新型含油污水絮凝剂研制成功", 《油田地面工程》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105016421A (en) * 2015-07-30 2015-11-04 李平兰 Industrial oil-containing sewage treatment agent
CN107572644A (en) * 2017-06-12 2018-01-12 盘锦金宇众和工程服务有限公司 Oil-field thick-oil sewage oil removing water cleaning agent preparation method
CN108993386A (en) * 2018-07-31 2018-12-14 郑州工程技术学院 A kind of cleanser and preparation method thereof for disposing polluted water in oil
CN110282687A (en) * 2019-07-09 2019-09-27 浙江大学常州工业技术研究院 Pharmaceutical wastewater inorganic agent

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Application publication date: 20130306